Utilizing the exhaust of engines



(No Model.)

D. RENSH-AW.

V UTILIZING THE, EXHAUST OF ENGINES. V No. 274,970. Patented Apr. 3. 1883.

l JVVEJVTOR 0M1 a lmw UNITED STATES PATENT OFFICE.

DAVID RENSHAW, OF BRAINTREE, MASSACHUSETTS.

UTILIZING THE EXHAUST OF ENGINES.

SPECIFICATION forming part of Letters Patent No. 274,970, dated April 3, 1883.

' Application filed February 14, 1883. (No model.)

To all whom it may concern Be it known that I, DAVID RENsHAw, of Braintree, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Utilizing the Exhaust of Engines; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable others skilled in the art to which-it appertains to make and use the same, reference being had to the accompanying drawing, and to theletters of reference marked thereon, which form part of this specification.

This invention has for its object the, utilization of the exhaust of'engines; and it consists in the process of returning the entire volume of the exhaust of the engine direct into the boiler from which it came, which process consists of first taking from the boiler a portion of its water, then subjecting said water to the cooling action of the atmosphere, and then forcing the water, by means of a pump, into contact with the exhaust direct from the engine in an injector connected with the boiler, upon the principle of the injector, as will hereinafter more fully appear.

Reference being had to the accompanying drawing, the figure being partly in elevation and partly in section, A represents the boiler or vessel for supplying steam to the engine, and B the engine. 0 is the coolingvessel,whicl1 receives such quantities of water from the boiler as will supply the force-pump for injecting all of the exhaust of the engine into the boiler. This vessel 0 is provided with a series of air'tubes passing through it, snfficient to cool the water to the required temperature. D is the pump, and E the injector.

The engine B and the boiler or vessel A are directly connected by the exhaust-pipe of the engine, upon which is located an injector, E, intermediate between the two. The pipe from the pump is also connected to the injector, through which the injection-water is introduced. The atmospheric cooling of water from the boiler is deemed sufficient for all pur poses for injecting the exhaust by means of the pump and injector into the boiler from which it was taken. The water which is used for pumping is taken from the primary boiler, and after doing its duty is again returned thereto in connection with the exhaust of the engine,and inthis way no surplus of water accumulates in the boiler.

supply pipe from the boiler to the cooler, and

fthe pipe from the cooling-tank to the pump. All these pipes are provided with the necessary controlling-valves in the usual manner.

G is a pipe located near the top of the boiler, for the introduction of steam from a distributing-main, should such be required. A small fire may be kept up in the furnace H for maintainingthe required temperature and pressure in the boiler to make good any heat lost in forcing the exhaust into the boiler.

This application is distinctive from two filed herewith, in one of which the water is cooled while under the boiler-pressure, and in the other the boiler-water is cooled by atmospheric pressure; but the exhaust is superheated before its introduction to theinjector, and in the latter a pump may be used in conjunction with the injector, neither of which methods are 'resorted to in this application. It is obvious thatall these methods are peculiarly adaptable to all kinds of engines-marine, locomotive, stationary, and portable.

Having thus described and shown one means of carrying my invention into efl'ect, what I claim as new, and desire to secure by Letters Patent, is-- l. The process of utilizing the exhaust of engines, consisting of first drawing off a portion of the water from the supply-boiler, then cooling it by the action of the atmosphere, then pumping it into contact with the exhaust of the engine in an injector, thus returning it into the boiler from which it came, on the principle of the injector.

2. The combination of devices for utilizing the exhaust of engines, consisting of the atmospheric cooler and suitable connecting-pipe, the pump, and theinjector, thelatterin direct connection with the exhaust and with the boiler, as set forth.

In testimony that I claim the foregoing as my own invention I affix my signature in presence of two witnesses.

B. F. MoRsELL, EUGENE D. CARUSI.

ICC 

